//	根节点字号调整
(function(doc, win) {

    var docEl = doc.documentElement,
        resizeEvt = 'orientationchange' in window ? 'orientationchange' : 'resize',
        recalc = function() {

            var clientWidth = docEl.clientWidth;
            if(!clientWidth) return;

            if(clientWidth >= 750) {
                docEl.style.fontSize = '100px';

            } else {
                docEl.style.fontSize = 100 * (clientWidth / 750) + 'px';
            }
        };

    if(!doc.addEventListener) return;
    win.addEventListener(resizeEvt, recalc, false);
    doc.addEventListener('DOMContentLoaded', recalc, false);

})(document, window);

